The problem is that GRRM gives us an insider view, which confirms all these outsider stereotypes to be true.

If we would only learn about the dothraki culture from outsiders and hearsay in his books it would indeed be more realistic, but instead we witness ourselves that the dothraki do indeed murder/rape people of their own ingroup, senseless killing of sheep and other nonsense ourselves when we follow characters inside a dothraki group.

Because he claims to base the Dothraki on real nomadic cultures, and have some realistic worldbuilding with dragons/magic on top. However the Dothraki are based only on stereotypes of nomads, not on these cultures themselves.

https://acoup.blog/2020/12/04/collections-that-dothraki-horde-part-i-barbarian-couture/

GRRM based the Dothraki on stereotypes about nomadic people, not on the nomadic horse cultures themselves and is often even as far as from the truth as you could be.

https://acoup.blog/2020/12/04/collections-that-dothraki-horde-part-i-barbarian-couture/

Some notable examples: Dothraki hate sheep to the point of killing them and not eating them and only care about horses, while for nomads livestock is their literal sustenance. Dothraki culture also seems to revolve strongly around rape and murder and other barbaric acts that would not be condoned in true historical nomadic cultures.

This wouldn't even be that bad if GRRM just said it was fantasy. Instead he claims it is realistic worldbuilding based on real cultures with a dash of fantasy.

Yeah, if you want to reduce addiction, give everyone good healthcare so people don't self-medicate and give people a good standard of living so they don't turn to substances to forget about their hardships.